Valve



FIG. 1 is a front elevational view of a valve according to the invention;

FIG. 2 is a top view of the valve of FIG. 1;

FIG. 3 is a right side elevational view of the valve of FIG. 1;

FIG. 4 is a bottom view of the valve of FIG. 1; and,

FIG. 5 is a left side elevational view of the valve of FIG. 1. 

The ornamental design for a valve, as shown and described. 